/**
 * Mixin to handle toast.
 * @mixin ApToastMixin
 */

'use strict'

import React, {PropTypes as types} from 'react'

const TOAST_TOASTER_KEY = "_apToastToaster";

/** @lends ApToastMixin */
const ApToastMixin = {

  // --------------------
  // Custom
  // --------------------
  $apToastMixed: true,

  /**
   * Get current toast messages.
   * @returns {object} - Messages object.
   */
  getToaster () {
    const s = this
    let toaster = s[ TOAST_TOASTER_KEY ] || s.context[ TOAST_TOASTER_KEY ]
    if (!toaster) {
      let msg = "Toaster no initialized. You need to call `.registerToaster()` on this component or one of it's parents"
      throw new Error(msg)
    }
    return toaster
  },

  /**
   * Set toast message.
   * @param {string} message - Message to set
   * @param {string} [level="default"] - Level of message.
   */
  toast (message, level) {
    const s = this
    let toaster = s.getToaster()
    level = level || 'default'
    toaster.emit('toast', {
      level: level,
      message: message
    })
  },

  /**
   * Set info toast message
   */
  infoToast (message) {
    const s = this
    s.toast(message, 'info')
  },

  /**
   * Set warn toast message
   */
  warnToast (message) {
    const s = this
    s.toast(message, 'warn')
  },

  /**
   * Set error toast message
   */
  errorToast (message) {
    const s = this
    s.toast(message, 'error')
  },

  /**
   * Decorate toast context.
   */
  registerToaster (toaster) {
    const s = this
    s[ TOAST_TOASTER_KEY ] = toaster
  },

  // --------------------
  // Specs
  // --------------------

  contextTypes: {
    [TOAST_TOASTER_KEY]: types.object
  },

  childContextTypes: {
    [TOAST_TOASTER_KEY]: types.object
  },

  getChildContext () {
    const s = this
    return {
      [TOAST_TOASTER_KEY]: s.getToaster()
    }
  }

  // --------------------
  // Lifecycle
  // --------------------

}

export default Object.freeze(ApToastMixin)